Abstract: To rock burst difficulty problem of retaining roadway under secondary mining influence,and then rock burst mechanism was analyzed from loading source of rock burst initating.The results showed that,before secondary mining influence,high stress concentration appeared at width coal pillar along goaf,under secondary mining influence,stress within 58m scope of ahead working face raised again,and stress concentration index was 2.20~5.39,surrounding stress increased to 1.5~4.2 times as chamber and roadway tunneled within coal pillar scope,lower and high energy level micro seismic appeared frequency.Under combined stresses of lateral abutment pressure,abutment pressured induced by secondary disturbing and stress concentration around coal pillar chamber,static loading of some local area of coal pillar accumulated to critical level,after static loading accumulated under mining distributed,and then coal pillar rock burst initiating loading level arrived.